<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>localStorage</title>
</head>
<body>
      <h2>localStorage</h2>
      <button onclick="saveData()">点我保存一个数据</button>
      <button onclick="readData()">点我读取一个数据</button>
      <button onclick="deleteData()">点我删除一个数据</button>
      <button onclick="deleteAllData()">点我清空一个数据</button>

      <script type="text/javascript">
        let p = {name:'张三',age:18}
        console.log(p)
        function saveData(){
            console.log(111)
            localStorage.setItem('msg1','hello!!!')
            localStorage.setItem('msg2','666')
            localStorage.setItem('person',JSON.stringify(p))
        }
        function readData(){
            console.log("==============================")
            console.log(localStorage.getItem('msg1'))
            console.log(localStorage.getItem('msg2'))

            const result = localStorage.getItem('person')
            console.log(JSON.parse(result))
        }

        function deleteData(){
            localStorage.removeItem('msg2')
        }

        function deleteAllData(){
            localStorage.clear()
        }

      </script>
</body>
</html>